20081565

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{1723}}^1$

素因数の和:1778

約数の個数: 48

約数和(自身を含む): 40879488

約数和(自身を除く): 20797923

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 37, 45, 63, 105, 111, 185, 259, 315, 333, 555, 777, 1295, 1665, 1723, 2331, 3885, 5169, 8615, 11655, 12061, 15507, 25845, 36183, 60305, 63751, 77535, 108549, 180915, 191253, 318755, 446257, 542745, 573759, 956265, 1338771, 2231285, 2868795, 4016313, 6693855, 20081565]

約数ペア:

[(1, 20081565), (3, 6693855), (5, 4016313), (7, 2868795), (9, 2231285), (15, 1338771), (21, 956265), (35, 573759), (37, 542745), (45, 446257), (63, 318755), (105, 191253), (111, 180915), (185, 108549), (259, 77535), (315, 63751), (333, 60305), (555, 36183), (777, 25845), (1295, 15507), (1665, 12061), (1723, 11655), (2331, 8615), (3885, 5169)]